randi, tonight's shot, stephen colbert facing one of your tougher audiences. he was in congress today, the unlikely star in a house subcommittee hearing on the plight of my grit farm workers. he stayed in character nearly the entire time. a lost folks laughing but others say it wasted the time of lawmakers at taxpayer expense. >> as we've heard this morning, america's farms are presently far too dependent on immigrant labor to pick our fruits and vegetables. the obvious answer is for all of to us stop eating fruits and vegetables. and if you look at the recent obesity statistics, you'll see many americans have already started. unfortunately, my gastroent rollist has informed me in no uncertain terms that they're a necessary source of roughage. i would like to submit a video of my colonoscopy into the record. i started my day with reconceived notions of migrant labor. after working with these men and women, picking beans, packing corn for hours on end side by side in the unforgiving sun, i have to say and i do mean this sincerely, please don't make me do this a